[GNC] Odd Invoice Total (Rounding Issue Maybe)

[Jeff]

Hi List,
Updated Comments on bug 612957. It seems this has been around for a while.

How are others using GnuCash in Australia with 10% GST (or other 
locations with Tax Included amounts being the normal way of expressing 
prices) entering Invoices to get around this issue?

Any advice appreciated, as I would like to upgrade to a more current 
version of GnuCash, but may need to stick with the old version while 
this issue is around if I can't find a workable solution.

Note, I have had the odd Invoice/Bill on the old system where the TAX 
amount is a cent different from the shops Receipt, but the Invoice/Bill 
total has always been correct.  I guess maybe this is the same rounding 
issue, just affecting the calculated values rather than the entered values.

Thanks,
Jeff.

On 4/6/22 10:46, Jeff wrote:
> Thanks Adrien, I will report it with the details.
>
> On 4/6/22 00:20, Adrien Monteleone wrote:
>> I'd file a bug, label it as 'Regression' since a change broke 
>> something that worked.
>>
>> Be sure to indicate the version that worked and the tested versions 
>> that do not.
>>
>> I vaguely recall some work done to 'improve' rounding due to other 
>> bugs around the 3.x series. I guess this slipped through or wasn't 
>> exposed/tested to catch it.
>>
>>
>> Regards,
>> Adrien
>>
>> On 6/3/22 8:49 AM, Jeff wrote:
>>> Thanks Adrien,
>>> Yes, since posting I have done some more testing, and it does appear 
>>> to be a rounding issue when using Inclusive Tax.
>>> I have also tried the same example in 4.10 Flatpak, and the issue 
>>> remains the same.
>>>
>>> I assume that in version 2.6.17 the calculation was made in a 
>>> different way.  I can't see any preferences that may be set 
>>> differently, that may be able to change the behaviour.
>>> It appears that when entering Inclusive Tax amounts, behind the 
>>> scene it actually calculates the Exclusive amount, then adds those 
>>> figures together to work out the Invoice Total.
>>>
>>> Is there any way to get the calculation behaviour back to how it 
>>> worked in 2.6.17?
>>
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